Holy crap! Before I never really paid much attention to these before. Portable apps are everywhere and most of them I have tried are just as good as off the hard drive programs. There are tons of them. And the best part is that you can use them on any computer with Windows. Here are a few download sites. Check them out.

Also, Chrome has a portable version, which is nice because you can take all of your bookmarks with you, and run the browser off of a flash drive. The only bummer is that it doesn't like to load more than one page at a time. You can view as many as you like, but don't load more than one.

Portable applications in general are software and programs you can run independently from a removable drives (like flash/pen drive) without going through the hassle of installing them. They are widely used and have been a favorite approach for professionals of different various industries.